6 Positive Effects Of Green Tea On Diabetes

Green tea is known to be one of the most popular drinks on earth positively impacting overall body health. One of the areas where this miraculous tea plays a major role is in controlling diabetes.

This article helps us to gain knowledge on the profound health effects of green tea on diabetes.

Now, let’s discuss how diabetes works on human body. Once your body intakes carbohydrate loaded food, it is absorbed to sugar. The pancreas releases insulin hormone which helps the cells to absorb glucose to be used as fuel. However, if you are diabetic, this process gets disturbed.

Green Tea and Diabetes

It has been studied since long that people consuming green tea have decreased fasting glucose levels, insulin levels and A1C levels also. These may be attributed to the activities of antioxidants like polyphenols and polysaccharides present in this tea.

People having diabetes are strictly required to keep a check on the food and beverages they consume. In such circumstances, they are restricted to zero calorie or very low-calorie drinks as per American Diabetes Association (ADA). So, green tea is the right choice for diabetes as it contains zero calories and almost no sugar at all.

List Of Positive Health Effects Of Green Tea On Diabetes

1. Aids In Weight Loss

Aids In Weight Loss
Aids In Weight Loss

Moreover, green tea is an excellent option if you are on a weight loss journey. Thus, if you lose weight, your sensitivity to insulin gets increased and thereby lowering blood glucose levels in your body. Thus, again green tea consumption is a boon for people with higher blood sugar levels. Moreover, it is also curbs out appetite and thus helps to prevent unhealthy food cravings and untimely hunger pangs.

2. Controls Type 2 Diabetes

Type 2 Diabetes
Type 2 Diabetes

Catechins (another type of antioxidant), present in high quantities in green tea has been proved to be beneficial for controlling type-2 diabetes. Catechins reduce the effects of insulin resistance by decreasing the digestion and absorption of carbohydrates. A study in Japan has already shown that people drinking six or more cups of green tea per day are 33% less likely to develop type 2 diabetes in comparison to those who consumed even less than a cup in a week.

3. Keeps Stress-free & Is An Excellent Anti-depressant

Anti Depressant
Anti-Depressant

Chronic diabetic conditions usually add stress and anxiety which is a strict no for people with diabetes. Here comes into play a cupful of green tea that manages the problem. Green tea contains amino-acid L-theanine which reduces stressful and anxious conditions and thus a sip of green tea may also calm down your mind and body. 

4. Reduces Risk Of Heart Disease

heart disease
Reduces risk of heart disease

Green tea is loaded with antioxidants like polyphenols which help to reduce oxidative stress thereby decreasing the chance of heart diseases. Diabetic people are always more prone towards heart diseases.

5. Boosts Metabolism

boosts metabolism scaled
Boosts Metabolism

The antioxidants present in this tea boosts metabolism and hence the digestive system is well taken care of. Further, a good digestion process plays an important role in maintaining proper blood sugar levels.

6. Helps To Control Cancer

cancer
Helps to control cancer

Diabetes increases the risk of certain types of cancer. Green tea containing the predominant polyphenols like EGCG has antioxidant activities. ECGC curbs out the growth of free radicals and thus may protect cells from DNA damage caused by reactive oxygen species.

Green tea polyphenols have been shown to restrict the breed of tumor cells and cause Apoptosis (A type of cell death in which a series of molecular steps in a cell lead to its death).

Catechins present in green tea hinders Angiogenesis (a symptom related to formation of blood vessels) and tumor cell invasiveness.

The polyphenols in green tea protect against the harmful effects of ultraviolet radiation.

Green tea activates detoxification enzymes that may help to control the growth of tumor.

How green tea contributes in controlling blood sugar levels

Consumption of this tea on a daily basis, but of course in moderation, decreases fasting glucose and fasting insulin levels. These are the two basic criteria to take care of diabetic health. Polyphenols and polysaccharides are the two major antioxidants useful for managing the blood pressure levels and also lowering the bad cholesterol levels in the body.

How much of this tea is ideal for a diabetic patient to get the maximum benefits

Keeping in mind the term “moderation”, one should start having green tea as it also contains certain amounts of caffeine though much lower in comparison to the regular sips. One more point to note here is that this tea is beneficial only if one consumes it without milk and sugar. So, 2-3 cups of this tea a day should be ideally good-to-go for someone who is diabetic. But, it is always safer to consult your medical practitioner to know the correct dosage as each one of us has a different physiology and medical conditions.

Finally, last but not the least, even inspite of so many health benefits of green tea on diabetes, having only cups of green tea is not the only solution for a diabetic patient. But a very good food habit along with other medications as per requirement and regular exercises should be the key to success to control sugar levels in your body.

Frequently Asked Questions

1. How Much Green Tea Should You Drink If You Have Diabetes?

This tea is beneficial only if you have it without milk and sugar. 2-3 cups of this tea per day is ideally good if you are diabetic. But, it is always safer to consult your medical practitioner to know the correct dosage as each one of us has a different physiology and medical conditions.

2. How it works – Lowering Blood Sugar Levels?

When you intake starch, it splits down into simple sugars absorbable in the blood stream with the help of an enzyme Amylase. Green tea contains antioxidant polyphenol which constrains amylase. A study has shown that just a cup of this tea restricts amylase activity by 87%.

3. What is the best time to drink green tea?

The best times to drink green tea are early morning and evening. In the early morning, your metabolism is the highest, so it can be further boosted up with a cup of hot steaming tea. Another cup is suggested for evening as your metabolic rate is towards its downfall during this time of the day and a sip of green tea now will again shoot up the metabolism.


– For this particular tea, you will need to heat water at 90 degree Celsius (temperature just before boiling) in a saucepan.

– Remove the saucepan from heat and add a teaspoon of green tea leaves to it.

– Once done, let the mixture brew and allow the tea to steep in the water.

– Serve hot and add a few lemon drops or ginger extract before drinking for the extra dose of vitamin C and immunity boosting benefits.

Please note that the right temperature of water before steeping in the tea leaves is mandatory to maintain for the perfect brew.

5. What are the side effects of green tea?

This tea has its side effects if consumed in excess which are:-

Irregular Heartbeat – Due to its caffeine, it perks up the heart rate also. This includes symptoms like tachycardia or palpitations in which one suffers from fast and irregular heartbeat.  This is a serious concern and may even lead to chest pain.

Diarrhoea and bloating issues –  People may suffer from diarrhoea at the beginning of starting green tea consumption.  Further, the caffeine content in this tea can bring loose stools for you. However, these symptoms are sure to fade away while you get used to the consumption on a regular basis. But, again, “drinking in moderation” is the key.

Heartburn – Green tea is usually acidic in nature, and hence it can cause acid reflux or heartburn. If you plan to go for a citrus-flavored tea of this variety, it is time to re-think before you buy it, as citrus-flavours will turn the tea to be more acidic. 

 Liver Disease – Uncontrolled consumption of green tea will definitely lead to liver issues. Hence, it should be consumed in limitations. 

Miscarriage and motherhood problems – For mothers-to-be or pregnant women or breast-feeding mothers, consumption of this tea in excess may be unsafe. The caffeine content in this may increase the risk of miscarriage in pregnant women apart from giving rise to other health issues. The caffeine content may also affect the infants for breast-feeding mothers. For mothers-to-be, this can even bring birth defects for the new born ones.

6. How are they related – Tea & Diabetes?

It has been studied since long that people consuming green tea have decreased fasting glucose levels, insulin levels and A1C levels also. These may be attributed to the activities of antioxidants like polyphenols and polysaccharides present in this tea. 

People having diabetes are strictly required to keep a check on the food and beverages they consume. In such circumstances, they are restricted to zero calorie or very low-calorie drinks as per American Diabetes Association (ADA). So, green tea is the right choice for diabetes as it contains zero calories and almost no sugar at all.

7. Why drinking green tea may help prevent and manage Type 2 Diabetes?

Catechins (a type of antioxidant), present in high quantities in green tea has been proved to be beneficial for controlling type-2 diabetes. Catechins reduce the effects of insulin resistance by decreasing the digestion and absorption of carbohydrates. A study in Japan has already shown that people drinking six or more cups of green tea per day are 33% less likely to develop type 2 diabetes in comparison to those who consumed even less than a cup in a week.

8. Green Tea for Diabetes: Can green tea help manage blood sugar levels?

Yes, green tea helps to control blood sugar levels along with a very good balanced diet, proper exercises and healthy lifestyle.

9. What are the best brands of green tea?


As per my studies and experiences, I usually recommend the following brands keeping in mind the quality aspects:-

Lipton green tea

Care Ashwagandha Spiced Green Tea For Weight Loss & Build Immunity | Detox Desi Kahwa Green Tea With Herbs Like Cinnamon, Tulsi, Ginger

Traditional Medicinals Organic Green Tea Ginger

Celestial Seasonings Antioxidant Green Tea

Teatox Life Sugar-free Green Tea for Diabetics Patient

Twinnings of London, Mint Green Tea

Default image
Anindita Sarkar Kundu
Articles: 5

Leave a Reply